Metal-binding machine.



J. A. PEARLL. METAL BENDING MACHINE.

APPLICATION FILED MAR 23. I915.

' Patented Dec. 14, 1915.

ATTORNEY JULIAN A. PEARLL, OF DETROIT, MICHIGAN.

METAL-BENDING MACHINE.

Specification of Letters Patent.

Patented Dec. 141, 1915.

Original application filed. November 24, 1914, Serial No. 873,758. Divided and. this application filed March 23, 1915. Serial No. 16,517.

To all whom it may concern Be it known that I, JULIAN A. PEARLL, a citizen of the United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Metal-Bending Machines, of which the following is a specification.

This invention relates to metal bending machines, the same being a division of my application filed November 24, 1914, Serial Number 873,758.

The primary object contemplated is the provision of means for automatically unlocking the vertically movable bending anvil immediately subsequent to the completion of the retrograde movements of the cooperative bending wings.

Generally speaking, the invention comprises a bed, a springcontrolled vertically movable bending anvil, a preliminary bending wing and a finishing bending wing, in combination with intermediate connections between the said anvil and preliminary bending wing whereby when the latter is drawn rearwardly upon completion of the operation of the machine, it will operate to withdraw certain locking mechanism which has previously engaged the said anvil and owing to the spring pressure exerted upon same will cause the anvil to be set in its normal position so that the succeeding operation can ensue without further manual manipulation.

To these and other ends, the nature of which will be readily understood as the invention is hereinafter disclosed, my invention consists in improved construction and combination of parts hereinafter fully described, illustrated in the accompanying drawings, and more particularly pointed out in the appended claim.

In said drawings, Figure 1 is a perspective view of the bending machine showing the application of my invention, and Fig. 2 is an enlarged detail view of a portion of the bed showing a retractable pin and associated parts.

Referring more particularly to the drawing for a detail description of my invention the numeral 1 designates the bed, and 2 the vertically movable bending anvil normally constrained outwardly by the coil spring 3 and provided with horizontally disposed recesses 4 adapted for engagement with the similarly located pins 5, which latter are also preferably maintained in engagement by means of the coil springs 6 contained within the enlarged portion 7 at one terminal of the bed. To the rear of the anvil 2 is a pair of wings 8 and 9, the former constituting the preliminary bending wing and the latter the finishing bending wing, and the two being hingedly connected to each other and in turn to the top of the bed as clearly set forth in my copending application. Each wing is equipped with an outwardly extending bail as 10 and 11 for the purpose of facilitating handling of the devices. in close proximity to the said anvil is arranged the vertical slot 11 which is for the purpose of initially holding the metal strip as fully set forth in my prior application.

The hereinbefore mentioned pins 5 have their outer terminals suitably connected to a transversely extending bar 12, and be tween the said bar and longitudinally extending links 13 arranged beneath the bed 1 of the machine, are a plurality of short levers 1e pivoted intermediate their ends to the laterally extending lugs 15. The opposite extremities of the links 13 are likewise pivoted at 16 to a plurality of short levers 17 which are supported by brackets 18 and have their upper terminals deflected as at 19 for engagement with the bail 10 of the preliminary bending wing S, as will be presently set forth.

As clearly explained in my co-pending application, immediately subsequent to the bending of the strips of metal the anvil 2 has become engaged by the pins 5 and has consequently receded from its operative position. Now with the cooperation of the hereinbefore described improvement as soon as the preliminary bending wing 8 has been swung rearwardly its bail 10 engages the deflected terminals 19 of the short levers 17 and serve to constrain the long links 13,

which occupies a position beneath the bed of the machine, rearwardly, this movement in turn communicating an outwardly swinging motion to the short levers 14 pivoted upon the opposite end of the bed, and since the last mentioned levers are connected to the common cross piece 12 and this in turn secured to the outer ends of the pins 5, it will readily be seen that the pins 5 will be simultaneously withdrawn from the recesses scribed but all equivalent means for performing the recited functions.

It is desired to be understood that I do not limit myself to the precise construction shown and described.

IVhat I claim is:

In a bending device of the class specified, a bed having means for holding a sheet metal strip in bending position, a depressible anvil mounted in the bed, a pair of bending wings, one of said Wings being adapted to depress said anvil during the bending operation, means for locking the anvil depressed, and means cooperating with the other wing for releasing said locking means upon completion of the bending operation.

I11 testimony whereof I ailiX my signature in presence of two witnesses.

JULIAN A. PEARLL.

Witnesses:

LOUIS A. Konmo, FRANK M. LEMKE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. 0. 

